FAN Qingke*,MENG Qinghua.Research upon the Electrochemical Properties of V-Ti-Ni-Co-Ce Vanadium Based Battery Alloys[J].Plating & Finishing,2019,(11):6-9.[doi:10.3969/j.issn.1001-3849.2019.11.002]
V-Ti-Ni-Co-Ce钒基电池合金电化学性能的研究
- Title:
- Research upon the Electrochemical Properties of V-Ti-Ni-Co-Ce Vanadium Based Battery Alloys
- 关键词:
- V-Ti-Ni-Co-Ce合金; 钒基汽车电池合金; 电化学循环稳定性能; 电化学耐腐蚀性能; 放电容量
- Keywords:
- V-Ti-Ni-Co-Ce alloy; vanadium-based automotive battery alloy; electrochemical cycling stability; electrochemical corrosion resistance; discharge capacity
- 文献标志码:
- A
- 摘要:
- 针对目前V-Ti-Ni电池合金电化学性能差等原因，采用球磨-烧结工艺制备了钒基汽车电池合金V-Ti-Ni和V-Ti-Ni-Co-Ce合金，并进行了电化学循环稳定性能、电化学耐腐蚀性能、物相组成以及显微组织的测试与分析。结果表明：V-Ti-Ni和V-Ti-Ni-Co-Ce合金都是由V基固溶体相和TiNi相组成。与V-Ti-Ni合金相比，V-Ti-Ni-Co-Ce合金的组织明显细化，晶粒分布更为均匀，网状晶界更加密集，从而为充放电循环过程中提供更好的进出通道，使得V-Ti-Ni-Co-Ce合金具有更佳的电化学循环稳定性能和电化学耐腐蚀性能：充放电循环15次后放电容量增大294 %；合金的腐蚀电位正移109 mA，腐蚀电流密度减小37 %。
- Abstract:
- Aimed at poor electrochemical performance of V-Ti-Ni alloy for battery, V-Ti-Ni and V-Ti-Ni-Co-Ce alloys for automotive batteries were prepared by ball milling-sintering process, and their electrochemical cycling stability, electrochemical corrosion, phase composition and microstructure were tested and analyzed. The results showed that V-Ti-Ni and V-Ti-Ni-Co-Ce alloys were composed of V based solid solution phase and TiNi phase. Compared with V-Ti-Ni alloy, V-Ti-Ni-Co-Ce alloy was obviously refined, the grain distribution was more uniform, and the reticular grain boundary was more dense, which would provide better accesses in and out during the charge-discharge cycle, and make V-Ti-Ni-Co-Ce alloy with better electrochemical cycle stability and electrochemical corrosion performance. The discharge capacity of V-Ti-Ni-Co-Ce alloy was increased by 294 % after charge-discharge cycles for 15 times, the corrosion potential was shifted 109 mA positively and the corrosion current density was decreased by 37 %.
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备注/Memo
收稿日期： 2019-04-19；修回日期： 2019-06-18
通信作者： 范庆科，email: qingkefan@yeah.net
基金项目： 浙江省教育厅一般科研项目(Y201941363)；浙江省自然科学基金资助项目(LY16E050003)